Lever types worksheet - Free Printable

Let's solve this step-by-step. The task is to identify the Effort (E), Resistance (R), and Fulcrum (F) for each tool or situation shown in the image, and then classify each as a Class 1, 2, or 3 lever based on their positions.

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🔍 Lever Basics:

- Fulcrum (F): The pivot point.
- Effort (E): Where force is applied.
- Resistance (R): The load or object being moved.

#### Lever Classes:
- Class 1: Fulcrum between Effort and Resistance → E-F-R or R-F-E
- Class 2: Resistance between Effort and Fulcrum → E-R-F or F-R-E
- Class 3: Effort between Fulcrum and Resistance → F-E-R

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Now, let’s analyze each image row by row:

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🟦 Row 1

1. Scissors
- Fulcrum (F): Pivot point where the two blades meet.
- Effort (E): Fingers apply force on the handles.
- Resistance (R): Paper or material being cut at the blade tips.
- Order: E – F – R
- ✔ Class 1 Lever

2. Nutcracker
- Fulcrum (F): Hinge at the back.
- Effort (E): Applied by fingers on the handles.
- Resistance (R): Nut inside the jaws.
- Order: E – F – R
- ✔ Class 1 Lever

3. Corkscrew (Wine bottle opener)
- Fulcrum (F): The hinge point of the lever arm.
- Effort (E): Applied at the handle.
- Resistance (R): Cork being pulled out.
- Order: E – F – R
- ✔ Class 1 Lever

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🟦 Row 2

4. Tweezers
- Fulcrum (F): The tip where the two arms meet (pivot).
- Effort (E): Applied by fingers near the base.
- Resistance (R): Object held at the tips.
- Order: F – E – R
- ✔ Class 3 Lever

5. Crowbar (or prying tool)
- Fulcrum (F): The edge under the rock.
- Effort (E): Applied at the end of the bar.
- Resistance (R): Rock being lifted.
- Order: E – F – R
- ✔ Class 1 Lever

6. Wheelbarrow
- Fulcrum (F): The wheel axle.
- Effort (E): Applied by hands on the handles.
- Resistance (R): Load in the tray.
- Order: E – R – F
- Wait — actually: F is at the wheel, R is in the middle, E is at the back → so order is F – R – E
- That means: Fulcrum – Resistance – Effort → Class 2 Lever
- ✔ Class 2 Lever

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🟦 Row 3

7. Broom
- Fulcrum (F): The hand holding the broom near the top.
- Effort (E): Pushing down with the other hand or foot.
- Resistance (R): Dirt on the floor being swept.
- But note: The person uses the broom like a lever. The fulcrum is at the top, effort is at the bottom, and resistance is in the middle.
- Order: F – R – E → Fulcrum at top, resistance (dirt) at bristles, effort at bottom.
- ✔ Class 2 Lever

8. Man using a long pole to move a rock
- Fulcrum (F): The ground where the pole rests.
- Effort (E): Applied at the far end by the man pushing down.
- Resistance (R): The rock being lifted.
- Order: E – F – R? No — wait: Fulcrum is at the ground, effort at the end, resistance at the rock → so it's E – F – R?
- Actually: Fulcrum is under the pole, effort is at the end, resistance is the rock → E – F – R → Class 1 Lever
- ✔ Class 1 Lever

9. Bicycle brake lever
- Fulcrum (F): The pivot point of the brake lever.
- Effort (E): Finger pressing the lever.
- Resistance (R): Cable pulling the brake pads.
- The lever is pivoted at one end, effort is applied in the middle, resistance is at the other end.
- Order: F – E – R
- ✔ Class 3 Lever

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🟦 Row 4

10. Shovel digging
- Fulcrum (F): The hand near the top of the shovel (holding it fixed).
- Effort (E): Applied by the other hand pushing down.
- Resistance (R): Soil being lifted.
- The shovel acts like a lever: fulcrum at the top hand, effort at the middle, resistance at the blade.
- Order: F – E – R
- ✔ Class 3 Lever

11. Fishing rod
- Fulcrum (F): The hand holding the rod (near the base).
- Effort (E): Applied by the other hand pulling or bending the rod.
- Resistance (R): Fish pulling at the line.
- The fish pulls at the end, the hand holds the base, effort is applied in the middle.
- Order: F – E – R → Fulcrum at base, effort in middle, resistance at tip.
- ✔ Class 3 Lever

12. See-saw (teeter-totter)
- Fulcrum (F): The central support.
- Effort (E): One child’s weight.
- Resistance (R): Other child’s weight.
- They are on opposite sides, so Effort and Resistance are on either side of the fulcrum.
- Order: E – F – R → Class 1
- ✔ Class 1 Lever

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✔ Final Answers Table:

| Image | Tool/Scene | Effort (E) | Resistance (R) | Fulcrum (F) | Lever Class |
|-------|-------------------------|------------|----------------|-------------|-------------|
| 1 | Scissors | Handles | Blade tips | Pivot | 1 |
| 2 | Nutcracker | Handles | Nut | Hinge | 1 |
| 3 | Corkscrew | Handle | Cork | Hinge | 1 |
| 4 | Tweezers | Fingers | Tips | Tip | 3 |
| 5 | Crowbar | End | Rock | Ground | 1 |
| 6 | Wheelbarrow | Handles | Load | Wheel | 2 |
| 7 | Broom | Bottom | Dirt | Top hand | 2 |
| 8 | Pole lifting rock | Man's end | Rock | Ground | 1 |
| 9 | Brake lever | Finger | Cable | Pivot | 3 |
| 10 | Shovel | Middle | Soil | Top hand | 3 |
| 11 | Fishing rod | Middle | Fish | Base | 3 |
| 12 | See-saw | One child | Other child | Center | 1 |

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Summary of Lever Classes:

- Class 1: Scissors, Nutcracker, Corkscrew, Crowbar, Pole + Rock, See-saw → 6 tools
- Class 2: Wheelbarrow, Broom → 2 tools
- Class 3: Tweezers, Brake lever, Shovel, Fishing rod → 4 tools

✔ All classified correctly based on mechanical principles.

Let me know if you'd like this formatted into a printable table!